Cita APA (7a ed.)
Oepik, E. (1938). Stellar Structure, source of energy, and evolution.
Cita Chicago Style (17a ed.)
Oepik, Ernst. Stellar Structure, Source of Energy, and Evolution. Tartu, 1938.
Cita MLA (9a ed.)
Oepik, Ernst. Stellar Structure, Source of Energy, and Evolution. 1938.
Precaución: Estas citas no son 100% exactas.